
author
Best known for the classic design reference Monograms & Ciphers, this name appears to represent a London-based studio rather than a single, easily documented individual author. The work is closely associated with A. A. Turbayne and other members of the Carlton Studio.

by A. A. (Albert Angus) Turbayne, Carlton Studio
Available catalog records credit Carlton Studio as the author or co-creator of Monograms & Ciphers, a decorative lettering and design book first published in the early 20th century. Multiple library and public-domain records describe it as being designed and drawn by A. A. Turbayne and other members of the Carlton Studio.
Reliable biographical information about Carlton Studio as a single person is hard to confirm. The strongest evidence suggests this was a studio or collective name, tied to design and illustration work in London, rather than an individual with a standard author biography.
Because the available sources focus mostly on the book itself and not on a personal life story, it is safest to treat Carlton Studio as a collaborative creative credit. That makes this name especially interesting to readers who enjoy historic design books and the shared craftsmanship behind them.